EP1961290B1 - Locking device for scissors - Google Patents

Locking device for scissors Download PDF

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Publication number
EP1961290B1
EP1961290B1 EP08002851A EP08002851A EP1961290B1 EP 1961290 B1 EP1961290 B1 EP 1961290B1 EP 08002851 A EP08002851 A EP 08002851A EP 08002851 A EP08002851 A EP 08002851A EP 1961290 B1 EP1961290 B1 EP 1961290B1
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EP
European Patent Office
Prior art keywords
locking device
bore
shears
pin
latching
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EP08002851A
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German (de)
French (fr)
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EP1961290A1 (en
Inventor
Gerhard Staudt
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Wolf Garten GmbH and Co KG
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Wolf Garten GmbH and Co KG
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Publication of EP1961290A1 publication Critical patent/EP1961290A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B13/00—Hand shears; Scissors
    • B26B13/12—Hand shears; Scissors characterised by the shape of the handles
    • B26B13/14—Hand shears; Scissors characterised by the shape of the handles without gripping bows in the handle
    • B26B13/16—Hand shears; Scissors characterised by the shape of the handles without gripping bows in the handle spring loaded, e.g. with provision for locking the blades or the handles
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G3/00—Cutting implements specially adapted for horticultural purposes; Delimbing standing trees
    • A01G3/02—Secateurs; Flower or fruit shears

Definitions

  • the invention relates to a locking device for scissors, especially for secateurs.
  • Such locking devices are generally used to protect the scissors when not in use against accidental opening and against injury.
  • the small space requirement when closed facilitates handling, storage and transport.
  • the locking position is at the same time the ready position in which the scissor handles can be comfortably grasped with one hand in order to hold the scissors ready for cutting after releasing the lock, which should be effected with the same hand.
  • the invention relates to a locking device of the type specified in the preamble of claim 1.
  • a secateurs with such a locking device is formed from the DE 20 2004 013 550 U1 known.
  • a slide constructed as a locking block engages in a locking recess of the counterpart designed as a parallel slot.
  • the closed position is determined by the edge contact of the linear relative to each other moving members.
  • the invention is therefore an object of the invention to provide a scissors-locking device of the type mentioned, which has a simple structure and ensures a complete and gap-free closing even after prolonged use and / or regrinding.
  • the invention is achieved with a simple structure that, largely independent of manufacturing tolerances and wear occurring during operation, the scissors can always be locked by the locking device in the fully closed state, i. with an anvil shears a light gap-free locking is always guaranteed, and with a double-edged shears the knife tips can always be optically precisely aligned in the closed position.
  • the tumbler is formed by a slide or elongated locking pin which is slidably disposed along its longitudinal axis in a bore in the first scissor leg, that a front locking portion of the locking bolt in the closed position of the scissors in the notch is inserted.
  • the locking pin preferably has the shape of a rotating part, which may possibly also be a flat component.
  • a cylindrical or slightly conical locking portion which is precisely displaceable in the notch of a part connected to the second scissor leg during the closing operation for blocking the opening movement.
  • the bore can comprise first and second bore sections with first and second central axes, respectively, which are arranged offset in a plane parallel to the axis in a plane extending at right angles to the hinge axis and extending through the first scissor leg such that the extension of the central axis the first bore portion has a greater distance from the hinge axis than the second bore portion.
  • the locking pin comprises a shaft having a rear, substantially spherical end facing away from the hinge axis and having an outer diameter which substantially corresponds to the inner diameter of the second bore section, and a front latching section, which is arranged with radial clearance in the first bore section and with the shaft via a is connected slightly conically widening transition section.
  • the transition section runs during the advancement of the locking pin in the notch over the formed between the first and second bore sections transition edge or stage such that the locking pin is pivoted about an axis parallel to the hinge axis of the spherical end and the Tip of the locking portion is pressed against an edge of the notch to bias the scissors in the closed position.
  • the adjoining the step portion of the front bore portion may be formed like a ramp, wherein the slightly flared transition portion of the locking pin is designed to be more conical than the ramp and having a contact point with the ramp.
  • the substantially spherical end serves to allow pivoting or angular movement of the locking bolt about its rearward end in the rearward bore portion in a plane perpendicular to the hinge axis.
  • this spherical end may also have, for example, an optionally spherical roller shape, in particular when the locking pin is designed as a flat component.
  • stiction is caused at the rear, substantially spherical end of the locking bolt to assist in locking.
  • the substantially spherical end is formed as an elastically deformable plastic bearing end to allow the angular movement of the locking pin.
  • the second bore portion may be lined accordingly.
  • the first point of contact of the detent notch with the detent portion is preferably rounded to facilitate entry of the detent pin into the detent notch.
  • the locking bolt may be displaceable by suitable actuating means which are arranged laterally or at the upper edge of the relevant scissor leg.
  • the drawing shows a preferred embodiment of the invention with reference to an anvil scissors.
  • the invention is also applicable to so-called bypass scissors in which the upper knife slides past the lower knife.
  • FIGS. 1 and 3 Anvil scissors shown has a first scissor leg 14 with an anvil holder 18 and an adjustable arranged anvil 12 and a second scissor leg 10 with a the anvil cooperating knife 16.
  • the two scissor legs 10 and 14 are connected to each other via a hinge axis 20.
  • An opening spring acts in the sense of opening the scissors.
  • the scissors is held against the force of the opening spring light gap in the closed position.
  • This locking device is actuated by a handle which on both sides of the first scissor leg 14 has a slide button 28, 29 for displacing a locking pin 30, which cooperates with a notch 22 in the knife 16 or a part connected thereto.
  • the knife 16 is mounted about the hinge axis 20, and it is bolted to the front portion of the scissor leg 10, riveted or positively connected to other Weie.
  • the notch 22 has a rounded cam surface which facilitates the engagement of the locking pin 30.
  • the locking pin 30 is slidably disposed along its longitudinal axis A in a bore 25 in the first scissor leg 14 such that its front locking portion 31 in the closed position of the scissors in the notch 22 is inserted.
  • the latching notch 22 facing the front end of the locking pin 30 is rounded or conical and accurately fitting in the notch 22 can be inserted to lock the scissors air gap-free.
  • the locking pin 30 has at the transition to the locking portion 31 of smaller diameter a cone portion 26, and it is guided in two axially offset in a plane lying bore portions 25 a, 25 b, wherein the rear end 32 of the locking pin 30 in axial displacement about a hinge axis 20 parallel Axis B is pivoted and the tip of its locking portion 31 is pressed against an edge of the locking notch 22 to bias the scissors in its closed position.
  • This pivoting is achieved in the illustrated embodiment, characterized in that the bore 25 first and second bore portions 25a, 25b with first and second central axes, which in a plane perpendicular to the hinge axis 20 and extending through the first scissor leg plane parallel to the axis a misalignment 24 are arranged offset such that the extension of the central axis of the first bore portion 25a has a greater distance from the hinge axis 20 than the axis of the second bore portion 25b.
  • the locking pin 30 comprises a shaft with a rear spherical end 32 facing away from the hinge axis 20 with an outer diameter which substantially corresponds to the inner diameter of the second bore portion 25 b, and a front latching portion 31 which is arranged with radial play in the first bore portion 25 a and with its Shank is connected via the cone portion 26.
  • This cone portion 26 runs during the advancement of the locking pin 30 in the notch 22 over the step 34 formed between the first and second bore portions 25a, 25b, so that the locking pin 30 is pivoted about an axis parallel to the axis 20 axis B of the spherical end 32 and the tip the latching portion 31 is pressed against an edge of the notch 22 to bias the scissors into the closed position.
  • the adjacent to the stage portion of the front bore portion 25a is formed like a ramp, wherein the cone portion 26 of the locking pin 30 is designed to be more conical than the ramp and thus has a contact point with the ramp.
  • the spherical end 32 of the locking bolt 30 there is a stiction to improve the lock. This can be achieved by forming the spherical end 32 as a deformable plastic bearing end to permit angular movement of the locking pin. Alternatively, the second bore portion 25b may be lined accordingly.
  • FIGS. 5a to 5c the operation of the locking pin 30 is shown in more detail.
  • the locking pin 30 is secured to a transverse to the plane of the first scissor leg 14 extending block 38 which is connected to the sliding buttons 28, 29 via locking cams.
  • the block 38 is pivotably mounted in a free space 36 on the sliding buttons 28, 29, and the locking pin 30 may additionally or alternatively be pivotally mounted in the block 38.
  • the slide button arrangement is in two parts and has locking cams, not shown, for the positive locking of the tumbler in the end position.
  • the slide button can also be made in one piece.
  • the slide button 28, 29 is arranged in the illustrated embodiment so that it can be operated with one hand with the thumb of the scissors comprehensive right or left hand. However, it could also be arranged on the upper edge of the relevant scissor leg.
  • FIGS. 1 to 3 The operation of the locking device will be described below with reference to FIGS. 1 to 3 and the corresponding enlarged partial views of the FIGS. 4a to 4c explained in more detail.
  • FIG. 1 the locking device is shown in the closed but unlocked position, wherein the locking pin 30 is disposed in its rearward position, supported by the spherical end 32 in the rear bore portion 25b on the one hand and on the step before the conical transition portion or truncated cone cylindrical locking portion 31 34 on the other hand, which is formed by the front axis-parallel bore portion at the step to the rear bore portion 25b.
  • the locking pin 30 is pushed over the sliding buttons 28, 29 further forward, as shown in the Figures 3 and 4c is shown in order to achieve the state "light gap-free".
  • the latching portion 31 of the locking pin 30 dives deeper into the notch 22 after the scissors has been further closed until the knife 16 is placed on the anvil 12, wherein the notch 22 rotates so far that the pushed forward locking pin 30 below simultaneously increasing leverage standing now in turn dips into the locking notch 22 without play.
  • the first scissor leg 14 takes over the parallel to each other in a plane offset from each other bore portions 25a, 25b, which run parallel or at an angle to each other, the functional requirement for this described preferred locking principle.
  • the rear bore portion 25b is for supporting the spherical end 32 of the locking bolt 30, the front bore portion 25a is formed with an orthogonal to the plane axis Window or aperture for receiving the block 38, a step (ramp function) over which the locking pin 30 slides with its integrated cone portion 26.
  • the locking bolt can be pushed further forward via the slide button.
  • the tip of the locking portion then lifts, as already mentioned above, as a result of existing on the locking pin "inclined plane” (cone or truncated cone) and opposes this resulting from the opening moment opening force by the forces on the inclined plane in turn a reaction force.
  • Self-inhibition prevails at the "inclined plane” or the cone.
  • This effect is achieved by a correspondingly slim angle and / or by friction-increasing areas or an additional component on the locking pin.
  • an additional friction-increasing design in the form of plastic parts or a plastic coating can also be attached to the contact areas between the sliding button and the grip shell, as explained above.

Abstract

The locking device has a shear shank (10) and another shear shanks (14) connected together by a pivot pin with a hand operating cutting head (28) and a locking pin operated by these, which locks the shear shanks in closing position against the force of an opening spring. The bolt is formed by longitudinally extending locking pin, which retracts in a bore (25) along its longitudinal axis in the shear shank such that a front detent section (31) of the locking pin is slided in the closed position of the shear in the detent notch (22).

Description

Die Erfindung betrifft eine Verriegelungsvorrichtung für Scheren, insbesondere für Gartenscheren.The invention relates to a locking device for scissors, especially for secateurs.

Derartige Verriegelungsvorrichtungen dienen allgemein dazu, die Scheren bei Nichtgebrauch gegen ein unbeabsichtigtes Öffnen und gegen eine Verletzungsgefahr weitgehend zu schützen. Der geringe Raumbedarf im geschlossenen Zustand erleichtert die Handhabung, die Ablage und den Transport.Such locking devices are generally used to protect the scissors when not in use against accidental opening and against injury. The small space requirement when closed facilitates handling, storage and transport.

Die Verriegelungsstellung ist gleichzeitig die Bereitschaftsstellung, in der die Scherengriffe bequem mit einer Hand erfasst werden können, um nach Lösen der Verriegelung, was mit der gleichen Hand bewirkt werden sollte, die Schere zum Schneiden bereitzuhalten.The locking position is at the same time the ready position in which the scissor handles can be comfortably grasped with one hand in order to hold the scissors ready for cutting after releasing the lock, which should be effected with the same hand.

Diese Forderungen sind im Allgemeinen dann erfüllt, wenn im geschlossenen Zustand die beiden Spitzen der Scherenschenkel nahe aneinander liegen und die Griffschalen einhändig bequem umschlossen werden können.These requirements are generally met when in the closed state, the two tips of the scissor legs are close to each other and the handles can be easily enclosed with one hand.

Die Erfindung geht aus von einer Verriegelungsvorrichtung der im Oberbegriff des Anspruchs 1 angegebenen Gattung. Eine Gartenschere mit einer derart ausgebildeten Verriegelungsvorrichtung ist aus der DE 20 2004 013 550 U1 bekannt. Hierbei greift in Verriegelungsstellung ein als Verriegelungsblock ausgebildeter Schieber in eine als Parallelschlitz ausgebildete Verriegelungsausnehmung des Gegenstückes ein. Die Schließstellung ist durch die Flankenberührung der linear relativ zueinander bewegten Glieder festgelegt.The invention relates to a locking device of the type specified in the preamble of claim 1. A secateurs with such a locking device is formed from the DE 20 2004 013 550 U1 known. In the locking position, a slide constructed as a locking block engages in a locking recess of the counterpart designed as a parallel slot. The closed position is determined by the edge contact of the linear relative to each other moving members.

Die an moderne Gartenscheren zu stellenden Forderungen bezüglich der Verriegelung gehen jedoch noch weiter. Insbesondere bei den Amboss-Scheren, bei denen die Schneidkante eines Schneidmessers mit einem Amboss des anderen Scherenschenkels zusammenwirkt, besteht die Forderung, dass die Schneidkante dem Amboss lichtspaltfrei anliegt. Fertigungstechnisch bedingte Toleranzen, aber auch ein sich während des Gebrauchs einstellender Verschleiß und ein Nachschleifen des Schneidmessers der Schere führen häufig dazu, dass sich in der Schließstellung ein paralleler oder keilförmiger Lichtspalt zeigt, was die Schneidleistung der Schere nicht notwendigerweise beeinträchtigen muss, aber vom Benutzer der Schere häufig als Mangel angesehen wird.However, the demands on locking on modern garden secateurs go even further. Especially with the anvil shears, in which the cutting edge of a cutting blade cooperates with an anvil of the other scissor leg, there is a requirement that the cutting edge rests against the anvil without light gaps. Production-related tolerances, but also during use adjusting wear and regrinding of the cutting blade of the scissors often lead to a parallel or wedge-shaped light gap shows in the closed position, which does not necessarily affect the cutting performance of the scissors, but the user Scissors are often regarded as a defect.

Dieses Problem der "Lichtspaltvermeidung" tritt zwar bei zweischneidigen Bypass-Scheren nicht auf, jedoch kann auch bei diesen ein unerwünschtes Spiel auftreten, wenn zu große Maß-Toleranzen in den Scherenpuffern liegen oder diese nicht genügend einfedern können.Although this problem of "light gap avoidance" does not occur with double-edged bypass scissors, however, an undesirable play can also occur with these if too large dimensional tolerances lie in the scissor buffers or if they can not deflect sufficiently.

Die genannten Probleme treten vornehmlich bei Gartenscheren auf, sie können sich jedoch auch bei anders gearteten Scheren zeigen, die durch Federkraft in die Öffnungsstellung überführt und durch eine Verriegelungsvorrichtung in der Schließstellung gehalten werden, so dass die Erfindung auch auf Scheren anderer vergleichbarer Art anwendbar ist.The problems mentioned occur mainly in pruning shears, but they can also be found in other types of scissors, which are transferred by spring force in the open position and held by a locking device in the closed position, so that the invention is also applicable to scissors other comparable type.

Um dennoch diesen eventuell vorhandenen Lichtspalt zwischen Amboss und Messer zu beseitigen, muss innerhalb der Scherenkonstruktion eine Ausgleich- und Verstellmöglichkeit vorgegeben sein, was durch die Forderung nach einem optimalen Schneidablauf zusätzlich noch geboten ist.In order nevertheless to eliminate this possibly existing light gap between anvil and knife, within the scissor construction a compensation and adjustment possibility must be given, which is in addition by the demand for an optimal cutting process still necessary.

Es ist bekannt, bei der Fertigung oder einer eventuellen Reparatur/beim Nachschleifen die relative Stellung durch eine lageorientierte Angleichung des Ambosses zur Schneidkante zu verstellen. Dies bedingt jedoch, dass die Schere etwas mehr oder weniger geschlossen werden muss, damit Messer und Amboss auf ihrer gesamten Länge aufliegen. Die üblichen Scheren-Verriegelungsvorrichtungen mit Zuhaltungen, die auf eine ganz bestimmte Einrastposition fixiert sind, können ein derartiges lichtspaltfreies Schließen nicht gewährleisten.It is known to adjust the relative position by a position-oriented alignment of the anvil to the cutting edge during manufacture or a possible repair / regrinding. However, this requires that the scissors must be closed a little more or less, so that the knife and anvil rest on their entire length. The usual scissors-locking devices with tumblers, which on a very specific Locking position are fixed, can not ensure such a gap-free closing.

Der Erfindung liegt daher die Aufgabe zugrunde, eine Scheren-Verriegelungsvorrichtung der eingangs genannten Art zu schaffen, die einen einfachen Aufbau aufweist und ein vollständiges und lichtspaltfreies Schließen auch nach längerem Gebrauch und/oder Nachschleifen gewährleistet.The invention is therefore an object of the invention to provide a scissors-locking device of the type mentioned, which has a simple structure and ensures a complete and gap-free closing even after prolonged use and / or regrinding.

Gelöst wird die gestellte Aufgabe durch die im Kennzeichnungsteil des Patentanspruchs 1 angegebenen Merkmale.The object is achieved by the features stated in the characterizing part of patent claim 1.

Vorteilhafte Ausgestaltungen und Weiterbildungen der Erfindung ergeben sich aus den Unteransprüchen.Advantageous embodiments and modifications of the invention will become apparent from the dependent claims.

Durch die Erfindung wird bei einfachem Aufbau erreicht, dass, weitestgehend unabhängig von Fertigungstoleranzen und im Betrieb auftretendem Verschleiß, die Schere durch die Verriegelungsvorrichtung immer im voll geschlossenen Zustand verriegelt werden kann, d.h. bei einer Amboss-Schere wird stets eine lichtspaltfreie Verriegelung gewährleistet, und bei einer zweischneidigen Schere können die Messerspitzen immer optisch genau ausgerichtet in die Schließstellung überführt sein.The invention is achieved with a simple structure that, largely independent of manufacturing tolerances and wear occurring during operation, the scissors can always be locked by the locking device in the fully closed state, i. with an anvil shears a light gap-free locking is always guaranteed, and with a double-edged shears the knife tips can always be optically precisely aligned in the closed position.

Zudem ist es möglich, durch Nachjustieren des Schneidmessers im Zusammenspiel mit dem Amboss einen längerfristigen lichtspaltfreien Zustand im verriegelten Zustand herbeizuführen.In addition, it is possible to bring about a longer-term light gap-free state in the locked state by readjusting the cutting blade in interaction with the anvil.

Bei der erfindungsgemäßen Verriegelungsvorrichtung wird die Zuhaltung durch einen Schieber oder langgestreckten Arretierbolzen gebildet, der entlang seiner Längsachse in einer Bohrung in dem ersten Scherenschenkel derart verschiebbar angeordnet ist, dass ein vorderer Rastabschnitt des Arretierbolzens in der Schließstellung der Schere in die Rastkerbe einschiebbar ist.In the locking device according to the invention the tumbler is formed by a slide or elongated locking pin which is slidably disposed along its longitudinal axis in a bore in the first scissor leg, that a front locking portion of the locking bolt in the closed position of the scissors in the notch is inserted.

Der Arretierbolzen weist vorzugsweise die Form eines Drehteils auf, der kann ggf. jedoch auch ein flächiges Bauteil sein.The locking pin preferably has the shape of a rotating part, which may possibly also be a flat component.

Am vorderen Ende des Arretierbolzens befindet sich ein zylindrischer oder schwach konischer Rastabschnitt, der passgenau in die Rastkerbe eines mit dem zweiten Scherenschenkel verbundenen Teils während des Schließvorgangs zum Sperren der Öffnungsbewegung verschiebbar ist.At the front end of the locking bolt there is a cylindrical or slightly conical locking portion, which is precisely displaceable in the notch of a part connected to the second scissor leg during the closing operation for blocking the opening movement.

Gemäß einer Ausgestaltung der Erfindung weist der Arretierbolzen an dem einen, der Rastkerbe zugewandten, Ende einen Kegelstumpf-Abschnitt auf, und er wird in zwei in einer Ebene achsparallel versetzt liegenden Bohrungsabschnitten geführt, wobei das eine Ende des Arretierbolzens bei axialer Verschiebung eine Drehbewegung, hervorgerufen durch die Kegelschräge, um den Mittelpunkt seines anderen kugelförmig ausgebildeten Endes erfährt.According to one embodiment of the invention, the locking pin on the one, the notch facing the end of a truncated cone section, and it is guided in two offset in a plane axially parallel bore sections, wherein the one end of the locking bolt during axial displacement a rotational movement, caused through the cone slope to the center of its other spherical end experiences.

Gemäß einer weiteren Ausgestaltung der Erfindung kann die Bohrung erste und zweite Bohrungsabschnitte mit ersten bzw. zweiten Mittelachsen umfassen, die in einer zur Gelenkachse unter einem rechten Winkel stehenden und sich durch den ersten Scherenschenkel erstreckenden Ebene achsparallel derart versetzt angeordnet sind, dass die Verlängerung der Mittelachse des ersten Bohrungsabschnittes einen größeren Abstand von der Gelenkachse aufweist als der zweite Bohrungsabschnitt. Der Arretierbolzen umfasst einen Schaft mit einem von der Gelenkachse abgewandten hinteren, im Wesentlichen kugelförmigen Ende mit einem Außendurchmesser, der im Wesentlichen dem Innendurchmesser des zweiten Bohrungsabschnittes entspricht, und einen vorderen Rastabschnitt, der mit Radialspiel in dem ersten Bohrungsabschnitt angeordnet und mit dem Schaft über einen sich leicht konisch erweiternden Übergangsabschnitt verbunden ist. Der Übergangsabschnitt läuft beim Vorschub des Arretierbolzens in die Rastkerbe über die zwischen den ersten und zweiten Bohrungsabschnitten gebildete Übergangskante oder Stufe derart hinweg, dass der Arretierbolzen um eine zur Gelenkachse parallele Achse des kugelförmigen Endes verschwenkt wird und die Spitze des Rastabschnittes gegen eine Kante der Rastkerbe gedrückt wird, um die Schere in die Schließstellung vorzuspannen.According to a further embodiment of the invention, the bore can comprise first and second bore sections with first and second central axes, respectively, which are arranged offset in a plane parallel to the axis in a plane extending at right angles to the hinge axis and extending through the first scissor leg such that the extension of the central axis the first bore portion has a greater distance from the hinge axis than the second bore portion. The locking pin comprises a shaft having a rear, substantially spherical end facing away from the hinge axis and having an outer diameter which substantially corresponds to the inner diameter of the second bore section, and a front latching section, which is arranged with radial clearance in the first bore section and with the shaft via a is connected slightly conically widening transition section. The transition section runs during the advancement of the locking pin in the notch over the formed between the first and second bore sections transition edge or stage such that the locking pin is pivoted about an axis parallel to the hinge axis of the spherical end and the Tip of the locking portion is pressed against an edge of the notch to bias the scissors in the closed position.

Der an die Stufe angrenzende Teil des vorderen Bohrungsabschnitts kann rampenartig ausgebildet sein, wobei der sich leicht konisch erweiternde Übergangsabschnitt des Arretierbolzens stärker konisch ausgestaltet ist als die Rampe und einen Kontaktpunkt mit der Rampe aufweist.The adjoining the step portion of the front bore portion may be formed like a ramp, wherein the slightly flared transition portion of the locking pin is designed to be more conical than the ramp and having a contact point with the ramp.

Das im Wesentlichen kugelförmige Ende dient dazu, ein Verschwenken oder die Winkelbewegung des Arretierbolzens um sein hinteres Ende in dem hinteren Bohrungsabschnitt in einer zur Gelenkachse unter einem rechten Winkel stehenden Ebene zu ermöglichen. Entsprechend kann dieses kugelförmige Ende auch beispielsweise eine gegebenenfalls ballige Walzenform aufweisen, insbesondere dann, wenn der Arretierbolzen als flächiges Bauteil ausgebildet ist.The substantially spherical end serves to allow pivoting or angular movement of the locking bolt about its rearward end in the rearward bore portion in a plane perpendicular to the hinge axis. Correspondingly, this spherical end may also have, for example, an optionally spherical roller shape, in particular when the locking pin is designed as a flat component.

Vorzugsweise wird am hinteren, im Wesentlichen kugelförmigen Ende des Arretierbolzens eine Haftreibung hervorgerufen, um die Verriegelung zu unterstützen.Preferably, stiction is caused at the rear, substantially spherical end of the locking bolt to assist in locking.

Dies kann beispielsweise dadurch erreicht werden, dass das im Wesentlichen kugelförmige Ende als elastisch verformbares Kunststofflagerende ausgebildet ist, um die Winkelbewegung des Arretierbolzens zu ermöglichen. Alternativ kann der zweite Bohrungsabschnitt entsprechend ausgekleidet sein.This can for example be achieved in that the substantially spherical end is formed as an elastically deformable plastic bearing end to allow the angular movement of the locking pin. Alternatively, the second bore portion may be lined accordingly.

Der erste Berührungspunkt der Rastkerbe mit dem Rastabschnitt ist vorzugsweise abgerundet, um den Eintritt des Arretierbolzens in die Rastkerbe zu erleichtern.The first point of contact of the detent notch with the detent portion is preferably rounded to facilitate entry of the detent pin into the detent notch.

Der Arretierbolzen kann durch geeignete Betätigungseinrichtungen verschiebbar sein, die seitlich oder an der Oberkante des betreffenden Scherenschenkels angeordnet sind.The locking bolt may be displaceable by suitable actuating means which are arranged laterally or at the upper edge of the relevant scissor leg.

Nachstehend wird ein Ausführungsbeispiel der Erfindung anhand der Zeichnung beschrieben. In der Zeichnung zeigen:

  • Figur 1 zeigt eine Amboss-Schere im geschlossenen, jedoch unverriegelten Zustand;
  • Figur 2 stellt einen Zwischenschritt bei der Verriegelung der Schere nach Figur 1 dar;
  • Figur 3 zeigt die Schere in vollständig geschlossenem und verriegeltem Zustand;
  • Figuren 4a bis 4c zeigen in größerem Maßstab Teilansichten der Verriegelungsvorrichtung in den Stellungen nach den Figuren 1 bis 3;
  • Figur 5a zeigt eine Schnittansicht eines Schiebeknopfes mit daran befestigten Arretierbolzen, geschnitten nach der Linie A-A gemäß Figur 5b;
  • Figur 5b zeigt eine Draufsicht des Schiebeknopfes mit Arretierbolzen;
  • Figur 5c ist eine perspektivische Ansicht des Schiebeknopfes mit dem daran befestigten Arretierbolzen.
Hereinafter, an embodiment of the invention will be described with reference to the drawings. In the drawing show:
  • FIG. 1 shows an anvil shears in the closed but unlocked state;
  • FIG. 2 makes an intermediate step in locking the scissors FIG. 1 group;
  • FIG. 3 shows the scissors in fully closed and locked condition;
  • FIGS. 4a to 4c show on a larger scale partial views of the locking device in the positions according to the FIGS. 1 to 3 ;
  • FIG. 5a shows a sectional view of a slide button with attached locking bolt, cut along the line AA according to FIG. 5b ;
  • FIG. 5b shows a plan view of the slide button with locking bolts;
  • FIG. 5c is a perspective view of the slide button with the attached locking pin.

Die Zeichnung zeigt ein bevorzugtes Ausführungsbeispiel der Erfindung anhand einer Amboss-Schere. Die Erfindung ist jedoch auch auf sogenannte Bypass-Scheren anwendbar, bei denen das obere Messer an dem unteren Messer vorbeigleitet.The drawing shows a preferred embodiment of the invention with reference to an anvil scissors. However, the invention is also applicable to so-called bypass scissors in which the upper knife slides past the lower knife.

Die in den Figuren 1 und 3 dargestellte Amboss-Schere weist einen ersten Scherenschenkel 14 mit einem Amboss-Halter 18 und einem daran verstellbar angeordneten Amboss 12 und einen zweiten Scherenschenkel 10 mit einem mit dem Amboss zusammenwirkenden Messer 16 auf. Die beiden Scherenschenkel 10 und 14 sind über eine Gelenkachse 20 miteinander verbunden. Eine nicht dargestellte Öffnungsfeder wirkt im Sinne eines Öffnens der Schere.The in the FIGS. 1 and 3 Anvil scissors shown has a first scissor leg 14 with an anvil holder 18 and an adjustable arranged anvil 12 and a second scissor leg 10 with a the anvil cooperating knife 16. The two scissor legs 10 and 14 are connected to each other via a hinge axis 20. An opening spring, not shown, acts in the sense of opening the scissors.

Durch die im Folgenden beschriebene Verriegelungsvorrichtung wird die Schere entgegen der Kraft der Öffnungsfeder lichtspaltfrei in Schließstellung gehalten.By the locking device described below, the scissors is held against the force of the opening spring light gap in the closed position.

Diese Verriegelungsvorrichtung wird durch eine Handhabe betätigt, die beidseitig am ersten Scherenschenkel 14 einen Schiebeknopf 28, 29 zur Verschiebung eines Arretierbolzens 30 aufweist, der mit einer Rastkerbe 22 im Messer 16 oder einem mit diesem verbundenen Teil zusammenwirkt. Das Messer 16 ist um die Gelenkachse 20 gelagert, und es ist mit dem Vorderabschnitt des Scherenschenkels 10 verschraubt, vernietet oder auf andere Weie formschlüssig verbunden. Die Rastkerbe 22 weist eine abgerundete Nockenfläche auf, die den Eingriff des Arretierbolzens 30 erleichtert.This locking device is actuated by a handle which on both sides of the first scissor leg 14 has a slide button 28, 29 for displacing a locking pin 30, which cooperates with a notch 22 in the knife 16 or a part connected thereto. The knife 16 is mounted about the hinge axis 20, and it is bolted to the front portion of the scissor leg 10, riveted or positively connected to other Weie. The notch 22 has a rounded cam surface which facilitates the engagement of the locking pin 30.

Der Arretierbolzen 30 ist entlang siner Längsachse A in einer Bohrung 25 in dem ersten Scherenschenkel 14 derart verschiebbar angeordnet, dass sein vorderer Rastabschnitt 31 in der Schließstellung der Schere in die Rastkerbe 22 einschiebbar ist.The locking pin 30 is slidably disposed along its longitudinal axis A in a bore 25 in the first scissor leg 14 such that its front locking portion 31 in the closed position of the scissors in the notch 22 is inserted.

Das der Rastkerbe 22 zugewandte vordere Ende des Arretierbolzens 30 ist abgerundet oder konisch ausgebildet und passgenau in die Rastkerbe 22 einschiebbar, um die Schere luftspaltfrei zu verriegeln. Der Arretierbolzen 30 weist am Übergang zum Rastabschnitt 31 kleineren Durchmessers einen Kegelabschnitt 26 auf, und er wird in zwei in einer Ebene achsparallel versetzt liegenden Bohrungsabschnitten 25a, 25b geführt, wobei das hintere Ende 32 des Arretierbolzens 30 bei axialer Verschiebung um eine zur Gelenkachse 20 parallele Achse B verschwenkt wird und die Spitze seines Rastabschnittes 31 gegen eine Kante der Rastkerbe 22 gedrückt wird, um die Schere in ihre Schließstellung vorzuspannen.The latching notch 22 facing the front end of the locking pin 30 is rounded or conical and accurately fitting in the notch 22 can be inserted to lock the scissors air gap-free. The locking pin 30 has at the transition to the locking portion 31 of smaller diameter a cone portion 26, and it is guided in two axially offset in a plane lying bore portions 25 a, 25 b, wherein the rear end 32 of the locking pin 30 in axial displacement about a hinge axis 20 parallel Axis B is pivoted and the tip of its locking portion 31 is pressed against an edge of the locking notch 22 to bias the scissors in its closed position.

Diese Verschwenkung wird bei der dargestellten Ausführungsform dadurch erreicht, dass die Bohrung 25 erste und zweite Bohrungsabschnitte 25a, 25b mit ersten bzw. zweiten Mittelachsen umfasst, die in einer zur Gelenkachse 20 unter einem rechten Winkel stehenden und sich durch den ersten Scherenschenkel erstreckenden Ebene achsparallel um einen Achsversatz 24 derart versetzt angeordnet sind, dass die Verlängerung der Mittelachse des ersten Bohrungsabschnittes 25a einen größeren Abstand von der Gelenkachse 20 aufweist als die Achse des zweiten Bohrungsabschnittes 25b.This pivoting is achieved in the illustrated embodiment, characterized in that the bore 25 first and second bore portions 25a, 25b with first and second central axes, which in a plane perpendicular to the hinge axis 20 and extending through the first scissor leg plane parallel to the axis a misalignment 24 are arranged offset such that the extension of the central axis of the first bore portion 25a has a greater distance from the hinge axis 20 than the axis of the second bore portion 25b.

Der Arretierbolzen 30 umfasst einen Schaft mit einem von der Gelenkachse 20 abgewandten hinteren kugelförmigen Ende 32 mit einem Außendurchmesser, der im Wesentlichen dem Innendurchmesser des zweiten Bohrungsabschnittes 25b entspricht, und einen vorderen Rastabschnitt 31, der mit Radialspiel in dem ersten Bohrungsabschnitt 25a angeordnet und mit seinem Schaft über den Kegelabschnitt 26 verbunden ist. Dieser Kegelabschnitt 26 läuft beim Vorschub des Arretierbolzens 30 in die Rastkerbe 22 über die zwischen den ersten und zweiten Bohrungsabschnitten 25a, 25b gebildete Stufe 34, so dass der Arretierbolzen 30 um eine zur Gelenkachse 20 parallele Achse B des kugelförmigen Endes 32 verschwenkt wird und die Spitze des Rastabschnittes 31 gegen eine Kante der Rastkerbe 22 gedrückt wird, um die Schere in die Schließstellung vorzuspannen.The locking pin 30 comprises a shaft with a rear spherical end 32 facing away from the hinge axis 20 with an outer diameter which substantially corresponds to the inner diameter of the second bore portion 25 b, and a front latching portion 31 which is arranged with radial play in the first bore portion 25 a and with its Shank is connected via the cone portion 26. This cone portion 26 runs during the advancement of the locking pin 30 in the notch 22 over the step 34 formed between the first and second bore portions 25a, 25b, so that the locking pin 30 is pivoted about an axis parallel to the axis 20 axis B of the spherical end 32 and the tip the latching portion 31 is pressed against an edge of the notch 22 to bias the scissors into the closed position.

Wie insbesondere aus den Figuren 4a bis 4c ersichtlich, ist der an die Stufe angrenzende Teil des vorderen Bohrungsabschnitts 25a rampenartig ausgebildet, wobei der Kegelabschnitt 26 des Arretierbolzens 30 stärker konisch ausgestaltet ist als die Rampe und damit einen Kontaktpunkt mit der Rampe aufweist.As in particular from the FIGS. 4a to 4c As can be seen, the adjacent to the stage portion of the front bore portion 25a is formed like a ramp, wherein the cone portion 26 of the locking pin 30 is designed to be more conical than the ramp and thus has a contact point with the ramp.

Am hinteren kugelförmigen Ende 32 des Arretierbolzens 30 besteht eine Haftreibung, um die Verriegelung zu verbessern. Dies kann dadurch erreicht werden, dass das kugelförmige Ende 32 als verformbares Kunststofflagerende ausgebildet ist, um die Winkelbewegung des Arretierbolzens zu ermöglichen. Alternativ kann der zweite Bohrungsabschnitt 25b entsprechend ausgekleidet sein.At the rear spherical end 32 of the locking bolt 30, there is a stiction to improve the lock. This can be achieved by forming the spherical end 32 as a deformable plastic bearing end to permit angular movement of the locking pin. Alternatively, the second bore portion 25b may be lined accordingly.

In den Figuren 5a bis 5c ist die Betätigung des Arretierbolzens 30 näher dargestellt.In the FIGS. 5a to 5c the operation of the locking pin 30 is shown in more detail.

Der Arretierbolzen 30 ist an einem sich quer zur Ebene des ersten Scherenschenkels 14 erstreckenden Block 38 befestigt, der mit den Schiebeknöpfen 28, 29 über Rastnocken verbunden ist.The locking pin 30 is secured to a transverse to the plane of the first scissor leg 14 extending block 38 which is connected to the sliding buttons 28, 29 via locking cams.

Der Block 38 ist in einem Freiraum 36 schwenkbar beweglich an den Schiebeknöpfen 28, 29 angeordnet, und der Arretierbolzen 30 kann zusätzlich oder alternativ in dem Block 38 schwenkbar befestigt sein.The block 38 is pivotably mounted in a free space 36 on the sliding buttons 28, 29, and the locking pin 30 may additionally or alternatively be pivotally mounted in the block 38.

Die Schiebeknopf-Anordnung ist zweiteilig und besitzt nicht dargestellte Rastnocken zur Zwangsfixierung der Zuhaltung in der Endlage. Bei anderen Ausführungsformen kann der Schiebeknopf auch einteilig ausgeführt sein.The slide button arrangement is in two parts and has locking cams, not shown, for the positive locking of the tumbler in the end position. In other embodiments, the slide button can also be made in one piece.

Der Schiebeknopf 28, 29 ist bei dem dargestellten Ausführungsbeispiel so angeordnet, dass er einhändig mit dem Daumen der die Schere umfassenden rechten oder linken Hand betätigt werden kann. Er könnte jedoch auch auf der Oberkante des betreffenden Scherenschenkels angeordnet sein.The slide button 28, 29 is arranged in the illustrated embodiment so that it can be operated with one hand with the thumb of the scissors comprehensive right or left hand. However, it could also be arranged on the upper edge of the relevant scissor leg.

Die Funktionsweise der Verriegelungsvorrichtung wird nachfolgend anhand der Figuren 1 bis 3 und der entsprechenden vergrößerten Teilansichten nach den Figuren 4a bis 4c näher erläutert.The operation of the locking device will be described below with reference to FIGS. 1 to 3 and the corresponding enlarged partial views of the FIGS. 4a to 4c explained in more detail.

In Figur 1 ist die Verriegelungsvorrichtung in geschlossener, aber unverriegelter Lage dargestellt, wobei der Arretierbolzen 30 in seiner hinteren Position angeordnet ist, abgestützt durch das kugelförmige Ende 32 in dem hinteren Bohrungsabschnitt 25b einerseits und den vor dem konischen Übergangsabschnitt oder Kegelstumpf 26 liegenden zylindrischen Rastabschnitt 31 auf der Stufe 34 andererseits, die durch den vorderen achsparallelen Bohrungsabschnitt an der Stufe zum hinteren Bohrungsabschnitt 25b gebildet wird.In FIG. 1 the locking device is shown in the closed but unlocked position, wherein the locking pin 30 is disposed in its rearward position, supported by the spherical end 32 in the rear bore portion 25b on the one hand and on the step before the conical transition portion or truncated cone cylindrical locking portion 31 34 on the other hand, which is formed by the front axis-parallel bore portion at the step to the rear bore portion 25b.

Sobald gemäß Figur 2 und Figur 4b der Block 38 um ein Teilstück 46 des Gesamtschiebeweges nach vorne geschoben ist, steht ein Spielraum 50 für einen funktionsbedingten Ausschlag des Arretierbolzens 30 zur Verfügung. Bei Beginn der Verschiebung des Schiebeknopfes ergibt sich im Spielraum 50 ein Ausschlag des Arretierbolzens 30 beim Auftreffen des Kegelstumpfes 26 auf die durch den vorderen Bohrungsabschnitt 25a gebildete Stufe 34 und die nachfolgende Rampe, wobei gleichzeitig der Rastabschnitt 31 in den Verrundungsbereich der Rastkerbe 22 eintritt. Hier ist noch ein Lichtspalt 52 erkennbar (Figur 2).As soon as according to FIG. 2 and FIG. 4b the block 38 is pushed forward by a portion 46 of the total sliding path, there is a margin 50 for a functional rash of the locking pin 30 available. At the beginning of the displacement of the slide button results in the clearance 50 a rash of the locking pin 30 upon impact of the truncated cone 26 formed on the front bore portion 25a step 34 and the subsequent ramp, at the same time the locking portion 31 enters the rounding region of the notch 22. Here is still a light gap 52 recognizable ( FIG. 2 ).

Der Arretierbolzen 30 wird über die Schiebeknöpfe 28, 29 weiter nach vorn geschoben, wie dies in den Figuren 3 und 4c gezeigt ist, um den Zustand "lichtspaltfrei" zu erreichen. Hierfür taucht der Rastabschnitt 31 des Arretierbolzens 30 tiefer in die Rastkerbe 22 ein, nachdem die Schere weiter bis zum Aufsetzen des Messers 16 auf den Amboss 12 geschlossen wurde, wobei die Rastkerbe 22 sich dabei so weit mitdreht, dass der nach vorne geschobene Arretierbolzen 30 unter gleichzeitig zunehmender Hebelwirkung stehend nun seinerseits spielfrei in die Rastkerbe 22 eintaucht.The locking pin 30 is pushed over the sliding buttons 28, 29 further forward, as shown in the Figures 3 and 4c is shown in order to achieve the state "light gap-free". For this purpose, the latching portion 31 of the locking pin 30 dives deeper into the notch 22 after the scissors has been further closed until the knife 16 is placed on the anvil 12, wherein the notch 22 rotates so far that the pushed forward locking pin 30 below simultaneously increasing leverage standing now in turn dips into the locking notch 22 without play.

Nach dem Loslassen der Scherenschenkel 10, 14 bleibt dieser lichtspaltfreie Zustand erhalten, weil der Arretierbolzen 30 und dessen Rastabschnitt 31 gegen die Kraft der Öffnungsfeder durch die Haftreibung an der Kontaktstelle des Kegelabschnitts 26 und des kugelförmigen Endes 32 sicher verriegelt ist, wobei diese Verriegelung durch die Schiebeknopf-Anordnung und deren Rastnocken in der Endlage zusätzlich gesichert wird.After releasing the scissor legs 10, 14 this light-gap-free state is maintained because the locking pin 30 and the latching portion 31 is securely locked against the force of the opening spring by the static friction at the contact point of the cone portion 26 and the spherical end 32, said locking by the Sliding button arrangement and their locking cam is additionally secured in the end position.

Der erste Scherenschenkel 14 übernimmt mit den zueinander parallel in einer Ebene versetzt zueinander liegenden Bohrungsabschnitten 25a, 25b, die parallel oder im Winkel zueinander verlaufen, die funktionelle Voraussetzung für dieses beschriebene bevorzugte Verriegelungsprinzip. Der hintere Bohrungsabschnitt 25b dient der Lagerung des kugelförmigen Endes 32 des Arretierbolzens 30, der vordere Bohrungsabschnitt 25a bildet mit einem zur Ebenenachse orthogonal stehenden Fenster oder Durchbruch zur Aufnahme des Blockes 38 eine Stufe (Rampenfunktion), über die der Arretierbolzen 30 mit seinem integrierten Kegelabschnitt 26 gleitet.The first scissor leg 14 takes over the parallel to each other in a plane offset from each other bore portions 25a, 25b, which run parallel or at an angle to each other, the functional requirement for this described preferred locking principle. The rear bore portion 25b is for supporting the spherical end 32 of the locking bolt 30, the front bore portion 25a is formed with an orthogonal to the plane axis Window or aperture for receiving the block 38, a step (ramp function) over which the locking pin 30 slides with its integrated cone portion 26.

Bei Auftreten eines Spiels zwischen dem Messer und dem Amboss kann der Arretierbolzen über den Schiebeknopf weiter nach vorn geschoben werden. Die Spitze des Rastabschnitts hebt sich dann, wie oben bereits erwähnt, infolge der am Arretierbolzen vorhandenen "schiefen Ebene" (Konus bzw. Kegelstumpf) weiter und setzt dieser aus dem Öffnungsmoment resultierenden Öffnungskraft durch die Kräfte an der schiefen Ebene seinerseits eine Reaktionskraft entgegen. Dies führt dazu, dass das gesamte Spiel bzw. der Lichtspalt zwischen Messer und Amboss kompensiert wird. An der "schiefen Ebene" bzw. dem Konus herrscht Selbsthemmung. Erreicht wird dieser Effekt durch einen entsprechend schlanken Winkel und/oder durch reibungserhöhende Bereiche bzw. einen zusätzlichen Bauteil an dem Arretierbolzen. Um dieser öffnenden Kraftkomponente noch zusätzlichen Widerstand entgegenzusetzen, kann zudem auch an den Kontaktbereichen zwischen Schiebeknopf und Griffschale eine zusätzliche reibungserhöhende Ausbildung in Form von Kunststoffteilen oder einer Kunststoffbeschichtung angebracht werden, wie dies weiter oben erläutert wurde.If a clearance occurs between the knife and the anvil, the locking bolt can be pushed further forward via the slide button. The tip of the locking portion then lifts, as already mentioned above, as a result of existing on the locking pin "inclined plane" (cone or truncated cone) and opposes this resulting from the opening moment opening force by the forces on the inclined plane in turn a reaction force. This results in that the entire game or the light gap between the knife and anvil is compensated. Self-inhibition prevails at the "inclined plane" or the cone. This effect is achieved by a correspondingly slim angle and / or by friction-increasing areas or an additional component on the locking pin. In order to provide additional resistance to this opening force component, an additional friction-increasing design in the form of plastic parts or a plastic coating can also be attached to the contact areas between the sliding button and the grip shell, as explained above.

Claims (12)

  1. A locking device for shears having first and second shears legs (10, 14) connected together by way of a pivot pin (20), having a manually operable sliding knob (28, 29) and a retaining memberwhich is operable thereby and which locks the shears legs (10, 14) in a closed position against the force of an opening spring, wherein the retaining member (30) arranged on the first shears leg (14) can be pushed into a latching notch (22) provided in a part connected to the second shears leg (10), wherein the retaining member is formed by an elongate slider (30) arranged slidably along its longitudinal axis (A) in a bore (25) in the first shears leg (14) in such a way that a front latching portion (31) of the slider (30) can be pushed into the latching notch (22) in the closed position of the shears,
    characterised in that there are provided means which pivot the slider (30) in its advance movement about an axis parallel to the pivot pin (20) and urge the tip of its latching portion (31) against an edge of the latching notch (22) to bias the shears into the closed position thereof.
  2. A locking device according to claim 1 characterised in that the slider is in the form of an arresting pin and the means for pivoting the arresting pin (30) have a step (34) in the bore (25a, 25b) guiding the arresting pin (30), on which the arresting pin (30) runs in its displacement with a cone portion (26).
  3. A locking device according to claim 1 characterised in that the arresting pin (30) is guided in two bore portions (25a, 25b) which are disposed in displaced axis-parallel relationship in one plane and between which is formed the step (34) by which the arresting pin (30) upon axial displacement performs its pivotal movement about the centre point of its rear end (32) which is of a spherical configuration.
  4. A locking device according to claims 1 and 3 characterised in that the first and second bore portions (25a, 25b) include first and second centre lines respectively which are arranged in a plane at a right angle to the pivot pin (20) and extending through the first shears leg in displaced axis-parallel relationship such that the prolongation of the centre line of the first bore portion (25a) is at a greater spacing from the pivot pin (20) than the second bore portion (25b), that the arresting pin (30) includes a shank with a rear spherical end (32) that is remote from the pivot pin (20) and that is of an outside diameter corresponding to the inside diameter of the second bore portion (25b), and a front latching portion (31) which is arranged with radial play in the first bore portion (25a) and is connected to the shank by way of the slightly conically enlarging conical portion (26) which in the advance movement of the arresting pin (30) into the latching notch (22) passes over the step (34) formed between the first and second bore portions (25a, 25b) in such a way that the arresting pin (30) is pivoted about an axis (B), parallel to the pivot pin (20), of the spherical end (32) and the tip of the latching portion (31) is urged against an edge of the latching notch (22).
  5. A locking device according to one of the preceding claims characterised in that the arresting pin (30) comprises a turned portion.
  6. A locking device according to one of claims 1 to 4 characterised in that the arresting pin (30) comprises a flat component.
  7. A locking device according to one of claims 4 to 6 characterised in that the part, adjoining the step (34), of the front bore portion (25a) is of a ramp-like configuration, wherein the slightly conically enlarging conical portion (26) of the arresting pin (30) is more greatly conical than the ramp.
  8. A locking device according to one of claims 3 to 7 characterised in that there is static friction at the rear spherical end (32) of the arresting pin (30).
  9. A locking device according to claim 8 characterised in that to increase the static friction the spherical end (32) is formed from plastic material and/orthe second bore portion (25a) is correspondingly lined.
  10. A locking device according to one of the preceding claims characterised in that the first contact point of the latching notch (22) with the latching portion (31) is rounded.
  11. A locking device according to one of the preceding claims characterised in that the arresting pin (30) is fixed to a block (38) which extends transversely to the plane of the first shears leg (14) and which is connected to at least one sliding knob (28, 29) with latching projections.
  12. A locking device according to claim 11 characterised in that the block (38) is arranged pivotably movably on the at least one sliding knob (28, 29).
EP08002851A 2007-02-22 2008-02-15 Locking device for scissors Active EP1961290B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102007008763A DE102007008763B3 (en) 2007-02-22 2007-02-22 Locking device for shears, has two shear shanks that are connected together by pivot pin with hand operating cutting head and locking pin operated by these, which locks shear shanks in closing position against force of opening spring

Publications (2)

Publication Number Publication Date
EP1961290A1 EP1961290A1 (en) 2008-08-27
EP1961290B1 true EP1961290B1 (en) 2009-07-08

Family

ID=39432142

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08002851A Active EP1961290B1 (en) 2007-02-22 2008-02-15 Locking device for scissors

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Country Link
EP (1) EP1961290B1 (en)
AT (1) ATE435591T1 (en)
DE (2) DE102007008763B3 (en)
ES (1) ES2329738T3 (en)
PT (1) PT1961290E (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CO6360206A1 (en) * 2010-07-30 2012-01-20 Pontifica Universidad Javerian ERGONOMIC TOOL FOR FLOWER AND FRUIT CUTTING
CO6360207A1 (en) * 2010-07-30 2012-01-20 Pontifica Universidad Javerian ERGONOMIC TOOL FOR FLOWER AND FRUIT CUTTING

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9110672U1 (en) * 1991-08-29 1991-11-21 Gardena Kress + Kastner Gmbh, 7900 Ulm, De
AT406130B (en) * 1997-11-28 2000-02-25 Wurscher Raimund Anvil garden shears
DE19832896A1 (en) * 1998-07-22 2000-01-27 Wolf Garten Gmbh & Co Kg New design of catch for secateur or pruner comprising of specific arrangement of locking plate and engagement area facilitates precise locking of elements for storage and transport
DE202004013550U1 (en) 2004-08-27 2004-12-16 Zeng, Min Zheng Secateurs have blades with curved ends and straight ends, both of which can be used for cutting plants, handles being rotated to use either straight or curved ends of blades

Also Published As

Publication number Publication date
ATE435591T1 (en) 2009-07-15
EP1961290A1 (en) 2008-08-27
DE502008000046D1 (en) 2009-08-20
PT1961290E (en) 2009-11-23
DE102007008763B3 (en) 2008-06-26
ES2329738T3 (en) 2009-11-30

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